"Sherlock Holmes never gave anything away."
"Out with it."
"Walls have ears," said Pillingshot.
"So have you," replied Scott crisply, "and I'll smite them in half a second."
Pillingshot sighed resignedly, and produced an envelope. From this he poured some dried mud.
"Here, steady on with my table-cloth," said Scott. "What's this?"
"Mud."
"What about it?"
"Where do you think it came from?"
"How should I know? Road, I suppose."